Only you can really answer that question since "missing out" and "better" is completely subjective based on what you like and what you want out of your photography. My favorite Leica lens is the 50/2 Summicron DR. I bought and used a 50/1.4 Summilux but frankly it just did not give me what I was after and the satisfaction of the images I got from it was not what I expected so I sold it. Of course that Summilux is an AWESOME lens and many people love it and I certainly liked it but it was not exactly what I wanted. I know you're asking about the Summicron but that's just an example for you. Good thing about many or most Leica lenses is you can buy, use, and then re-sell for as much if not more than you paid.